*ASAP* Read the paragraphs. The concerns about sending people to Mars are definitely worth considering. For one thing, the mission will cost billions of dollars. This would be a huge additional cost at a time when national debts continue to skyrocket. Also, that money could help fix problems here on Earth.

Mars may have valuable resources. The Earth’s resources are already starting to dwindle, and our population continues to grow. Finding resources on Mars could provide much-needed relief for the overstressed ecosystems of Earth.

What is the best way to connect the paragraphs?

deleting the last sentence of the first paragraph
deleting the first sentence of the second paragraph
adding a transition at the beginning of the second paragraph
adding another sentence with evidence at the end of the first paragraph